This may seem like a stupid question but I was wandering whether it's possible to use my wi-fi connection as my mobile signal in order to send texts and call people. Basically, is there a way to make my WIFI act as my signal.

The reason I'm asking is because 'Three' has some problems in my town so I have no signal when I'm at home, so I want to know if it's possible for me to use wifi as my signal.